Abstract: An electrophotographic toner suitable for use in an image-forming apparatus employing an organic photoconductor is disclosed which comprises toner particles and, adherent to the surface thereof, magnetic particles having an FeO content of 17% by weight or lower, a specific surface area of from 2.5 to 6 m.sup.2 /g, and an octahedral or hexahedral particle shape. The toner functions to prevent toner components and paper dust from adhering to the surface of an organic photoconductor, and has satisfactory moisture resistance.

Abstract: An erasure method for an image recorded on a reversible heat-sensitive recording medium comprising the step of contacting a thermal head to apply an amount of heat as an electric wave pulse to the recorded image in a heat-sensitive recording layer, characterized in that the amount of heat as pulse waves satisfies the following formula (1)E.sub.(n-1)th >E.sub.(n)th (1)whereinE.sub.(n)th indicates an amount of heat applied to one dot of the thermal head the nth time,E.sub.(n-1)th indicates an amount of heat applied to one dot of the thermal head the (n-1)th time, and.sub.n indicates a number of times the amount of heat is applied, and is an integer greater than 2.

Abstract: This invention provide a novel cross-linked polyaniline derivative soluble or capable of swelling in general organic solvents, which forms an elastic self-standing film or fibers. The polyaniline derivative substantially comprises a polyaniline having number average molecular weight in a range of from 2,000 to 500,000 represented by the following formula (I) as the main polymer chain, ##STR1## wherein m and n is 0 or an integer of at least 1, m/(m+n)=0-1, and m+n=10-5,000, and cross-linking units represented by the following formula (II) ##STR2## wherein X is a direct bond, a substituted or unsubstituted divalent C.sub.1 -C.sub.30 aliphatic hydrocarbon group, a substituted or unsubstituted divalent aromatic hydrocarbon group, a divalent polysiloxane group or a group derived therefrom, or a divalent group derived from a compound having 2 or more repeating structural unit, Y.sup.1 and Y.sup.

Abstract: A toner for electrophotography is disclosed which includes at least a polyester resin and a colorant, the polyester resin including at least a saturated polyester resin having a melting initiation temperature of from 50.degree. C. to less than 100.degree. C., and a crosslinked polyester obtained by crosslinking an unsaturated polyester resin. The toner is highly safe and tenaciously fixable to receiving paper at low temperatures and causes no offset problem in practical use.

Abstract: A toner for electrophotography and a process for producing the same are disclosed. The toner is formed from particles which are formulated from at least a cured composition which contains at least a binder resin having an unsaturated double bond, and can also contain a reactive monomer, a radical-polymerization catalyst, and a catalyst. The resulting particles each have a crosslinking density that gradationally increases from the center towards the surface of the particle. The toner of the present invention is fixable at low temperatures, has no problems associated with storage stability in practical use, and can be firmly fixed to receiving paper.

Abstract: This invention provides a novel cross-linked polyaniline derivative soluble or capable of swelling in general organic solvents, which forms an elastic self-standing film or fibers. The polyaniline derivative substantially comprises a polyaniline having number average molecular weight in a range of from 2,000 to 500,000 represented by the following formula (I) as the main polymer chain, ##STR1## wherein m and n are 0 or an integer of at least 1, m/(m+n)=0-1, and m+n=10-5,000, and cross-linking units represented by the following formula (II) ##STR2## wherein X is a direct bond, a substituted or unsubstituted divalent C.sub.1 -C.sub.30 aliphatic hydrocarbon group, a substituted or unsubstituted divalent aromatic hydrocarbon group, a divalent polysiloxane group or a group derived therefrom, or a divalent group derived from a compound having 2 or more repeating structural units, y.sup.1 and y.sup.

Abstract: This invention provides a novel cross-linked polyaniline derivative soluble or capable of swelling in general organic solvents, which forms an elastic self-standing film or fibers. The polyaniline derivative substantially comprises a polyaniline having number average molecular weight in a range of from 2,000 to 500,000 represented by the following formula (I) as the main polymer chain, ##STR1## wherein m and n are 0 or an integer of at least 1, m/(m+n)=0-1, and m+n=10-5,000, and cross-linking units represented by the following formula (II) ##STR2## wherein X is a direct bond, a substituted or unsubstituted divalent C.sub.1 -C.sub.30 aliphatic hydrocarbon group, a substituted or unsubstituted divalent aromatic hydrocarbon group, a divalent polysiloxane group or a group derived therefrom, or a divalent group derived from a compound having 2 or more repeating structural units, Y.sup.1 and Y.sup.

Abstract: This invention provide an adhesive tape by which adhesion to a metal spreader is not required and a cutting process is not necessary. The adhesive tape comprises an adhesive layer provided on at least one surface of metal sheet, said adhesive layer being semi-cured into a B-stage and comprised of: (a) a piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer of the formula (I): ##STR1## wherein, k, m, and n are molar ratios and taking n as l, k is a number of 3-175, and m is a number of 0.3 to 93; and (b) a compound having at least two maleimide groups, the ratio of component (b) based on 100 parts by weight of component (a) being in a range of 10 to 900 parts by weight, and said adhesive layer being composed of at least two semi-cured layers having each a different status of semi-cure.

Abstract: Adhesive tapes which can be adhered and cured at a relatively low temperature, keeps enough electric insulation in case of adhering to the leadframe of semiconductor devices. The adhesive tape comprises a releasing film and an adhesive layer provided on a surface of said releasing film, said adhesive layer being semi-cured into a B-stage and composed of:(a) a piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000, an acrylonitrile content of 5-50% by weight and an amino equivalent of 500-10,000, represented by the formula (I): ##STR1## wherein, k, m, and n are molar ratios and taking n as 1, k is a number of 3-175, and m is a number of 0.

Abstract: The present invention provides a suspension polymerization method for producing a polymerized particle having cavities in the particle.

Abstract: A two-component developer suitable for use with an image-forming apparatus which permits the removal and recovery of a toner remaining on a photoconductive drum after the transfer of the toner to a receptor sheet without using cleaning means, comprisinga toner formed of toner matrix particles containing a binder resin and a colorant as main components, and a magnetic powder adhering to a surface of each toner matrix particle, anda magnetic carrier having a saturation magnetization of 90 to 200 emu/g in an external magnetic field of 3,000 oersted.

Abstract: A toner for developing an electrostatic image comprising at least a colorant and a binder resin,characterized in that the main component of the binder resin is a polyester resin, and the polyester resin is containing a polymer prepared by reacting a polyester oligomer and at least one compound selected form the group consisting of long chain alcohols and long chain carboxylic acids which have 12 or more carbon atoms.

Abstract: Novel polyaniline derivatives soluble in general organic solvents are provided without impairment of the inherent good properties of the corresponding polyanilines. The novel polyaniline derivatives are polymers represented by the following formula (I): ##STR1## wherein Y means a group represented by the following formula: R.sub.1 CO--, R.sub.2 S--, R.sub.2 SO--, R.sub.2 SO.sub.2 -- or R.sub.5 .paren open-st.O--R.sub.4 .paren close-st..sub.k --OR.sub.3 --, R.sub.1 through R.sub.5 being particular substituent groups, k is an integer of 0-5, and n and m independently represent polymerization degree and are integers satisfying the following equations: m/(n+m)=0.01-1 and n+m=20-1000. They can each be produced by reacting a halide, which is represented by the following formula: Y--X wherein Y has the same meaning as described above and X means a chlorine or bromine atom, to a reduced polyaniline.

Abstract: A powder coating is provided, comprising a particulate material having a particle distribution satisfying the following requirements:(a) the volume 50% diameter is from 7 .mu.m to 20 .mu.m;(b) the proportion by volume of particles having a particle diameter of not less than 30 .mu.m is not more than 20%; and(c) the proportion by population of particles having a particle diameter of not more than 5 .mu.m in the particulate material is not more than 65%, the particulate material also has an external additive attached to the surface thereof, the percent coverage by the external additive (determined by an equation described in the specification) being from 30 to 200%. The powder coating can provide a film having a reduced thickness with an improved leveling, thus improving working efficiency. In addition, the fractions of the powder coating from the coating process can be recycled and re-used, thereby reducing the total cost.

Abstract: A toner for developing an electrostatic image, which is excellent in low-temperature fixing properties, the prevention of offsetting and uniform chargeability, and which comprises a colorant and a polyester resin modified with an ethyleneimine derivative.

Abstract: A magnetic toner having a specific surface area of not more than 3.0 m.sup.2 /g computed by the Brunauer Emmett Teller equation and the number of molecules of CO.sub.2 gas, being equal to 100/nm.sup.2 to 1000/nm.sup.2, adsorbed by the toner is provided. The triboelectrification of magnetic toner particles of the magnetic toner is uniformed by adjusting the magnetic toner using an impact force so that the specific surface area of the magnetic toner and the number of molecules of CO.sub.2 gas adsorbed by the toner are presented in the range described above.

Abstract: A contact-type nonmagnetic one-component developing method using a developing apparatus having at least a developer carrying member and a developer layer thickness control member provided so as to be adjacent to, or to be in contact under pressure with, said developer carrying member, which method comprises feeding a developer to said developer carrying member, forming a thin layer of the developer on a surface of the developer carrying member with the developer layer thickness control member with negatively charging the developer under friction, bringing the thin layer of the developer into contact with a photoconductive material holding an electrostatic latent image to develop the electrostatic latent image, and transferring the resultant developed image to an image receptor, said developer being a nonmagnetic one-component developer prepared by attaching fine particles of an additive to be positively charged to particles of a toner which is comprised mainly of a binder resin and a colorant and which is to

Abstract: A desensitizing solution for lithographic platemaking which mainly comprises phytic acid or a salt thereof is disclosed, said desensitizing solution containing a polyether polyamine or a derivative thereof represented by formula (I): ##STR1## wherein k, m, x, and y each represent an integer of 1 or more; and R.sub.1 represents a hydrogen atom or C.sub.n H.sub.2n R.sub.2, wherein n is an integer of 1 or more, and R.sub.2 represents a hydrogen atom, an NR.sub.3 R.sub.4 (wherein R.sub.3 and R.sub.4 each represent a hydrogen atom or an alkyl group), a chlorine atom, a fluorine atom, an iodine atom, a bromine atom, a hydroxyl group, a carboxyl group or a carbamoyl group,or a polyamine derivative represented by formula (II): ##STR2## wherein X represents a halogen atom; p and each represent an integer of from 2 to 6; and r represents an integer of from 3 to 2000. The desensitizing solution exhibits satisfactory desensitizing characteristics without causing environmental pollution.

Abstract: An adhesive tape for TAB having an organic insulating film, an adhesive layer formed on the organic insulating film and a protection layer formed on the adhesive layer, the adhesive layer being any one of a layer containing a polyamide resin having an amine value of at least 3 and an epoxy resin, a layer containing a polyamide resin and a powdery inorganic filler, a layer containing an epoxy resin having a siloxane structure in its main chain, and a layer containing at least one maleimide compound.

Abstract: This invention is to provide a liquid adhesive of the present invention can be adhered and cured at a relatively low temperature and have sufficient heat resistance and reliability, etc., and an adhesive tape using the same.The liquid adhesive of this invention is obtainable by dissolving (a) a piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000, an acrylonitrile content of 5-50% by weight, and an amino equivalent of 500-10,000, represented by the following formula (I): ##STR1## wherein, k, m, and n are molar ratios and taking n as 1, k is a number of 3-175, and m is a number of 0.3 to 93; and (b) a compound having at least two maleimide groups, the ratio of component (b) based on 100 parts by weight of component (a) being in the range of 10 to 900 parts by weight.